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根据电网的终端变电站的二次母线（１０ｋＶ或３５ｋＶ）的接线特点，以母线电压和网损作为目标函数，以有载调压变压器和并联电容器作为调节手段，推导出变电站电压无功控制器的控制规律，并着重分析了抽头变化、并联电容器的投切效果与系统网络参数的关系．此外本文还论述了ＶＱＣ变电站电压无功控制器的硬件、软件设计思想、主要特点及采用的新技术；介绍了现场运行的情况；指出了ＶＱＣ—Ⅱ型变电站电压无功控制器对ＶＱＣ—Ⅰ型的改进之处．
According to the connection characteristics of the secondary bus (10kV or 35kV) in the terminal substation of the power grid, taking the bus voltage and the network loss as the objective functions and the on-load regulating transformer and shunt capacitor as the adjusting measures, the voltage and reactive power controller Control law, and emphatically analyzes the change of tap, the effect of switching capacitor in parallel with the relationship between system network parameters. In addition, this paper also discusses the VQC substation voltage and reactive power controller hardware and software design ideas, the main features and the use of new technologies; describes the scene of the operation; points out the VQC-Ⅱ substation voltage and reactive power controller VQC-Ⅰ Type of improvement.